Swinging scaffold.



N. ROYAGK.

SWINGING SOAPPOLD.

APPLICATION FILED mm: 10, \914.

Patented Oct. 6, 19,14.

2 F P way a. 5 9 .o 4 2 a z a 2 5 2 f n w a m 0mm "5 m 3 2 3 3 4 Qm) ,6 m q wv mw a {I NATHAN ROYACK, or BROOKLYN, NEW Yank.

FFICE'.

SWINGING SGAFFOLD.

Specification of Letters Patent,

Patented Oct. 6, 1914,

Application filed June 10. 1914. Serial No. 844,218.

T 0 all whom it m (197 conccm Be 1t known that I, NATHAN ROYACK, a

subject of the Czar of Russia, and a resident of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Swinging Soafiolds, of which the following is a specification.

The invention relates to improvements in swinging scaffolds designed for the use of painters and other artisans while at work upon the vertical sides of a building; and the object of the invention is to provide a suitable track and connections for supporting and moving the scaffold or working platform whereby the latter may be readily shifted bot-h vertically and horizontally by the workmen thereon to embrace the entire surface of the several walls of the building. And the invention further includes certain details of construction hereinafter set forth.

In describing the invention in detail reference is had'to the accompanying drawings, forming a part of this specification, and wherein like characters of reference are used to designate like parts throughout the several views, and in which:

Figure 1 illustrates a plan of a portion of a building having a section of a track temporarily secured thereon and provided with a movable swinniugscafi'old as embodied in the present invention: Fin. 2 is a side elevation of the device: and Fig. 3 is an enlarged transverse section of the track, showing a means of its support from a building and also the power carriagc for effecting the movement of the swingingscafiold along the track.

In the drawings. numeral 1 designates a portion of a building, to which is temporarily secured by any approved means a track 2. As herein shown, the track is provided with a plurality of supporting-brackets 3. one end of the latter being fixed to the track while the opposite end rests upon bearing'blocks l. supported upon the roof of the building. Attached to the eyes 5 or the brackets, are ropes 6 for securing the brackets in any well-known manner. The track, with suitable curved portions 7 and the convcniently disposed supporting brackets 3, is adapted to be extended in length to embrace one or all sides of the building, and on its upper edge the track is formed with teeth 3. constituting a rack for the engagement of toothed gearing.

Surroundin the track and movable there on are similar y arranged frames 9 and 10, the former constituting a pair of hangerheads and the latter a power-carriage. At the rear side, the several frames are provided with a clearance-space for the foot of the fixed brackets 3, and at their lower ends the frames are provided with rotatable guiderollers 11, which engage the lower edge of the track and vertically osition the same thereon in conjunction wit the gears 12 and 12, rotatably mounted in the upper end of the frames and engaging the teeth on the upper edge of the track. At the lower ends of the hanger-heads 9, eyes 13 are rovided for the reception of a hook forme on the pulley-blocks 14, the latter carryin flexible cables or chains, 15, arranged to adj support the scaffold or working latform 16.

Uprights 17 are fixed to the p atform and are provided at their upper ends with eyes 18 for the connection of one end of the cables 15, the opposite end of the latter being coiled around and secured to the drums 19, mounted for rotation in t e brackebbearings 20, fixed to the uprights 7. Motion is imparted -t0 the drumsin well-known manner by worm-wheels fixed on the drum-shafts and engatzed by worms 21, mounted in the bracket-bearings, and actuated by the handcranks 22, the whole forming winches of common construction, which may be readily ustably operated to adjust the vertical height of the i working-platform.

The hanger-heads 9 and the power-carriage 10, are connected together for horizontal movement along the track by the double pair of links 23, pivotally jointedato gether and to the straps 24 and 25, respectively fixed to said heads and carriage. To offset the normal alinement of the connectionlinks 23 for maintaining a substantially uniform spacing of the hanger-heads upon the track. a leaf-spring- 26 is fixed at. one end to one of the links of each pair. while its opposite end engages the opposite link with sulficicnt pressure to yieldingly urge a contact between the adjacent square portions of the pivoted joints 27. I

For imparting movement to the powercarriage 10, a relatively small gear 28 is fixed upon the shaft 29 and arranged to en gage the larger gear 12 which in turn engages the rack formation the 11 per edge of the track, as heretofore described The Shaft 29 is rotatably mounted in the frame of the outer end With a chain-wheel 30, provided with a hand-chain 31, the latter being" guided in its movement adjacent the wheel by the fork 32, fixed to the upper end of the frame. By the operation of the hand-chain, the gear Wheels 28 and l2 may be rotated and the carriage and its connected hanger-heads and scaffold propelled along the full length of the track in either direction, and in passing around the curved portion of the latter the springs 26 will yield and permit a lateral swinging movement of the connection-links L3 about their pivoted joints, and in returning or passing to a straight portion of the track the springs Will cause the link-connections to again assume their normal-straightline position and efi'ect the substantially uniform spacing of the hanger-heads upon'the track.

' As thus constructed, it Will'be evident that the workmen upon the scafiold may readily operate the mechanism therefrom, and shift the same both vertically and horizontally to embrace the entire surface of the several Walls of the building.

What I claim as my invention and desire to secure by Letters Patent, is:

In a swinging scaffold the combination of a track having straight and curved porti ons, han gcr-heads movable along said track, a scaffold suspended from said hanger-heads, a pmver-carriage movable along said track and disposed between said hanger-heads,connections between said power-carriage and the hanger-heads comprising pivotally jointed links arran 'ed for lateral movement s rin s connected to said links and yieldingly c0ntrolling said lateral movement, and actuating means for said power-carriage engaging said track.

Signed at New York, in the county of New York and State of New York, this eighth day of June, A. D. 1914.

f v NATHAN ROYACK Witnesses HERMAN LAzAnUs,

HERMAN ROKUSON. 

